try_index

A boilerplate library that provides traits TryIndex and TryIndexMut.

Unlike the ones in try_traits, this gives explicit implementations for all standard library collections, which can actually fail. In exchange, no blanket implementation is provided.

use try_index::*;

let foo = vec![4, 3, 6, 2];
assert_eq!(foo.try_index(2), Some(&6));
assert_eq!(foo.try_index(4), None);
assert_eq!(foo.try_index(1..=2), Some(&[3, 6][..]));

This crate has a default std feature that may be disabled for no_std support, as well as an alloc feature that enables no_std alloc container types. See documentation for more information.

License

Copyright 2026 Developers of the try_index project

try_index is distributed under the terms of both the MIT license and the Apache License (Version 2.0).

See files LICENSE-APACHE and LICENSE-MIT, and COPYRIGHT for details.